Hi @KB104,
Welcome to the Roku Community!
Thanks for letting us know about this behavior. We'd like to see how we can help. Have you checked to see if an unfamiliar device is connected to your network? Commonly, devices that can cast to your TV must be connected to the same network as your TV. Changing your network password might be a good option to resolve this.
Keep us posted.
All the best,
Kash
Takashi O.
Roku Community Moderator
